keep also old test for native interpolation algs

(cherry picked from commit acd4cec)

python/plugins/processing/tests/testdata/qgis_algorithm_tests.yaml

@@ -1771,7 +1771,7 @@ tests:
       DISTANCE_COEFFICIENT: 2.0
       EXTENT: 0.0,8.0,-5.0,3.0 [EPSG:4326]
       INTERPOLATION_DATA:
-        name: pointsz.gml::~::0::~::1::~::0
+        name: pointsz.gml::~::1::~::1::~::0
         type: interpolation
       PIXEL_SIZE: 0.026667
     results:
@@ -1819,6 +1819,80 @@ tests:
       #  name: expected/triangulation.gml
       #  type: vector
 
+  - algorithm: qgis:idwinterpolation
+    name: IDW interpolation using attribute (old parameters)
+    params:
+      COLUMNS: 300
+      DISTANCE_COEFFICIENT: 2.0
+      EXTENT: 0, 8, -5, 3
+      INTERPOLATION_DATA:
+        name: pointsz.gml::~::0::~::1::~::0
+        type: interpolation
+      ROWS: 300
+    results:
+      OUTPUT:
+        hash:
+        - 56d2671d50444f8571affba3f9e585830b82af5e380394178f521065
+        - 2ae62aca803e6864ac75e47b4357292b0637d811cb510ed19471f422
+        type: rasterhash
+
+  - algorithm: qgis:idwinterpolation
+    name: IDW interpolation using Z value (old parameters)
+    params:
+      COLUMNS: 300
+      DISTANCE_COEFFICIENT: 2.0
+      EXTENT: 0, 8, -5, 3
+      INTERPOLATION_DATA:
+        name: pointsz.gml::~::1::~::-1::~::0
+        type: interpolation
+      ROWS: 300
+    results:
+      OUTPUT:
+        hash:
+        - 56d2671d50444f8571affba3f9e585830b82af5e380394178f521065
+        - 2ae62aca803e6864ac75e47b4357292b0637d811cb510ed19471f422
+        type: rasterhash
+
+  - algorithm: qgis:tininterpolation
+    name: TIN interpolation using attribute (old parameters)
+    params:
+      COLUMNS: 300
+      EXTENT: 0, 8, -5, 3
+      INTERPOLATION_DATA:
+        name: pointsz.gml::~::0::~::1::~::0
+        type: interpolation
+      METHOD: '0'
+      ROWS: 300
+    results:
+      OUTPUT:
+        hash:
+        - 87f40be6ec08f3fcbb5707762de71f6be35bb265c61f594335562a26
+        - a31f0faf918ebe0902e5c9c5c8cf606d30f52eb4094bf24e4f8ac67a
+        type: rasterhash
+      #TRIANGULATION_FILE:
+      #  name: expected/triangulation.gml
+      #  type: vector
+
+  - algorithm: qgis:tininterpolation
+    name: TIN interpolation using Z value (old parameters)
+    params:
+      COLUMNS: 300
+      EXTENT: 0, 8, -5, 3
+      INTERPOLATION_DATA:
+        name: pointsz.gml::~::1::~::-1::~::0
+        type: interpolation
+      METHOD: '1'
+      ROWS: 300
+    results:
+      OUTPUT:
+        hash:
+        - 5e14dd0b879884b8b8da56c082947dad681feb4e9f1137f5cda126f8
+        - b8389559d6a85e7a672d72254228473fae71af2d89e5a5dd73d1b0d7
+        type: rasterhash
+      #TRIANULATION_FILE:
+      #  name: expected/triangulation.gml
+      #  type: vector
+
   - algorithm: native:removenullgeometries
     name: Remove null geometries
     params: